add string to text file python code example

Example 1: python append to file

with open(filename, "a+") as f:
  f.write('Hello World')

Example 2: append a line to a text file python

# Open a file with access mode 'a'
file_object = open('sample.txt', 'a')
 
# Append 'hello' at the end of file
file_object.write('hello')
 
# Close the file
file_object.close()